diff --git a/lib/worker.js b/lib/worker.js
index 839d1ab939a85680e832b3f933adf27fc6587d18..9eafbb338b206dfd0835467162dc12a4b768dd26 100644
--- a/lib/worker.js
+++ b/lib/worker.js
@@ -63,6 +63,7 @@ async function processPackageFile(repoName, packageFile, packageConfig) {
       upgradeType: 'maintainYarnLock',
     });
     upgrade.upgradeType = 'maintainYarnLock';
+    upgrade.commitMessage = upgrade.yarnMaintenanceCommitMessage;
     upgrade.branchName = upgrade.yarnMaintenanceBranchName;
     upgrade.prTitle = upgrade.yarnMaintenancePrTitle;
     upgrade.prBody = upgrade.yarnMaintenancePrBody;